1 /*
2
3 File: file_mysql.c
4
5 Copyright (C) 2006-2007 Christophe GRENIER <grenier@cgsecurity.org>
6
7 This software is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License along
18 with this program; if not, write the Free Software Foundation, Inc., 51
19 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20
21 */
22
23 #ifdef HAVE_CONFIG_H
24 #include <config.h>
25 #endif
26 #ifdef HAVE_STRING_H
27 #include <string.h>
28 #endif
29 #include <stdio.h>
30 #include "types.h"
31 #include "filegen.h"
32
33
34 static void register_header_check_mysql(file_stat_t *file_stat);
35 static int header_check_mysql(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new);
36
37 const file_hint_t file_hint_mysql= {
38 .extension="MYI",
39 .description="MySQL (myi/frm)",
40 .max_filesize=0,
41 .recover=1,
42 .enable_by_default=1,
43 .register_header_check=®ister_header_check_mysql
44 };
45
46 static const unsigned char mysql_header[4]= {0xfe, 0xfe, 0x07, 0x01};
47 static const unsigned char mysql_header_def[2]= {0xfe, 0x01};
48
register_header_check_mysql(file_stat_t * file_stat)49 static void register_header_check_mysql(file_stat_t *file_stat)
50 {
51 register_header_check(0, mysql_header,sizeof(mysql_header), &header_check_mysql, file_stat);
52 register_header_check(0, mysql_header_def,sizeof(mysql_header_def), &header_check_mysql, file_stat);
53 }
54
header_check_mysql(const unsigned char * buffer,const unsigned int buffer_size,const unsigned int safe_header_only,const file_recovery_t * file_recovery,file_recovery_t * file_recovery_new)55 static int header_check_mysql(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
56 {
57 /* MySQL MYISAM compressed data file Version 1 */
58 if(buffer[0]==0xfe && buffer[1]==0xfe && buffer[2]==0x07 && buffer[3]==0x01)
59 {
60 reset_file_recovery(file_recovery_new);
61 file_recovery_new->extension="MYI";
62 return 1;
63 }
64 /* MySQL table definition file Version 7 up to 10 */
65 if(buffer[0]==0xfe && buffer[1]==0x01 && (buffer[2]>=0x07 && buffer[2]<=0x0A) && buffer[3]==0x09 && buffer[5]==0)
66 {
67 reset_file_recovery(file_recovery_new);
68 file_recovery_new->extension="frm";
69 return 1;
70 }
71 return 0;
72 }
73